Create a Cloud distribution group

Hi,

We'd like to create a form in Active Roles web client that allows the creation of an Exchange online distribution group with the command New-DistributionGroup without creating an on-premise AD object in a hybrid environment.  There isn't an out-of-the-box solution for this but I'm hoping we can use the method of creating a cloud shared mailbox as a template. I tested it last year but I can't find the article now on how to do it and deleted everything I'd done when I found an alternative.  All we're looking for is for helpdesk staff to type in a name and select an owner from AD that will create a cloud group, which the owner can then populate themselves.  Has anyone else tried to do this?  We've got a script I think will work for the creation, the problem is getting some kind of form and/or command to trigger the creation using a workflow or provisioning policy and that's where I'm stumbling.

Thanks in advance